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    <title>杨澎锴的时间作业08</title>
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        width: 79%;
        height: 50px;
        position: fixed;
        left: 65px; 
        text-align: center;
        border:2px forestgreen solid;
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    .pr{background-color: gray;
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    <link rel="stylesheet" href="mian.css" />
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  <body>
      <section class="pr"style="position: relative" >
    <p class="fixedhead">杨澎锴怎么那么棒呢</p>
    <a href="../index1.html" > 返回首页</a>
    <h1>定位及布局</h1></section>
    <section>
      <li>display</li>
      <p>
        Lorem ipsum <span>dolor</span> sit, amet consectetur adipisicing elit.
        <span class="in-b">Aliquam</span> dolore, quo laboriosam odit iusto
        ullam quibusdam eaque! Eaque error nulla, dolorum sapiente, possimus
        quos, ipsum quod reiciendis fugit magnam voluptas.
      </p>
      <div><a href="float.html">浮动实践链接</a></div>
      <div>
        <a href="position.html">position实验</a><br><a href="position1.html">实验2</a></br>
      </div>
    </section>
        <p>
            Lorem ipsum <span>dolor</span> sit, amet consectetur adipisicing elit.
            <span class="in-b">Aliquam</span> dolore, quo laboriosam odit iusto
            ullam quibusdam eaque! Eaque error nulla, dolorum sapiente, possimus
            quos, ipsum quod reiciendis fugit magnam voluptas.
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        <p>
            Lorem ipsum <span>dolor</span> sit, amet consectetur adipisicing elit.
            <span class="in-b">Aliquam</span> dolore, quo laboriosam odit iusto
            ullam quibusdam eaque! Eaque error nulla, dolorum sapiente, possimus
            quos, ipsum quod reiciendis fugit magnam voluptas.
        </p>
        <p>
            Lorem ipsum <span>dolor</span> sit, amet consectetur adipisicing elit.
            <span class="in-b">Aliquam</span> dolore, quo laboriosam odit iusto
            ullam quibusdam eaque! Eaque error nulla, dolorum sapiente, possimus
            quos, ipsum quod reiciendis fugit magnam voluptas.
        </p>
        <p>
            Lorem ipsum <span>dolor</span> sit, amet consectetur adipisicing elit.
            <span class="in-b">Aliquam</span> dolore, quo laboriosam odit iusto
            ullam quibusdam eaque! Eaque error nulla, dolorum sapiente, possimus
            quos, ipsum quod reiciendis fugit magnam voluptas.
        </p>
        <p>
            Lorem ipsum <span>dolor</span> sit, amet consectetur adipisicing elit.
            <span class="in-b">Aliquam</span> dolore, quo laboriosam odit iusto
            ullam quibusdam eaque! Eaque error nulla, dolorum sapiente, possimus
            quos, ipsum quod reiciendis fugit magnam voluptas.
        </p>
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